Hello! I find your editor modern and interesting to use. But also english is not my first languge, so somtimes I can barely understand things that might be obvious to you. Well, How can I lock the door in editor? What should I press?
To lock a door, first be in 'Edit: Thing' mode by clicking the button at the top, then click on the Door object. It will automatically open 'Inspect', from there you can edit the properties of the object, such as its 'Door locked' state.